一种基于经验模态分解和局部极大值点数的配电网高阻接地故障检测方法OA
A high impedance-grounding fault detection method for distribution network based on empirical mode decomposition and local maximum point number
配电网高阻接地故障(HIF)因故障特征微弱而难以被常规装置检测到,容易引发过电压、火灾和人身触电等安全问题.本文提出一种将时频分解和阈值判断结合的 HIF 识别方法.首先,利用经验模态分解(EMD)对零序电流进行处理;然后,选取第二个固有模态分量(IMF)作为特征分量并进行高斯滤波;最后,统计特征分量的局部极大值点的个数来判断是否发生HIF.利用PSCAD/EMTDC软件搭建 10kV配电网模型进行算法验证.仿真结果表明,所提方法能够以较高的准确…查看全部>>
The high impedance-grounding fault(HIF)of the distribution network is difficult to detect with conventional equipment due to its weak fault characteristics,which may cause safety issues such as overvoltage,fire,and personal electric shock.This paper introduces a HIF recognition method that combines time-frequency decomposition and threshold judgment.Initially,the zero-sequence current is processed using empirical mode decomposition(EMD).Subsequently,th…查看全部>>
唐钧益;曾肖枫;高伟
福州大学电气工程与自动化学院,福州 350108国网福建省电力有限公司泉州供电公司,福建 泉州 362001福州大学电气工程与自动化学院,福州 350108
配电网高阻接地故障(HIF)经验模态分解(EMD)局部极大值点数
distribution networkhigh impedance-grounding fault(HIF)empirical mode decomposition(EMD)local maximum point number
《电气技术》 2024 (6)
14-23,10
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